Only read the initial post now, but buoy 53046 has been offline since at least the 19th and it was showing an almost 1700 foot sea level drop.. this was the response I got from contacting the Australian bureau of meteorology.. "Buoy 53046 [SEC=UNCLASSIFIED]" "The South Bali Buoy, numbered 53046, has been producing erroneous readings since mid August.

We are investigating the cause of this, which is likely due to the buoy and associated pressure sensor unit on the sea floor being dragged by a vessel. To avoid concerns from anomalous observations data, the feed has been switched off until the issue can be resolved. In the interim tsunami monitoring and warning observations data can be obtained from two nearby buoys numbered 56001 and 56003.